[binc] Migrating from POP to IMAP

I would like to migrate from POP to IMAP and was hoping that I could 
find some advice here.

1. Are there any tools available that can convert archives
    (such as MS Outlook files) to an IMAP heirarchy?

2. How do you generally deal with archives? When your folders
    become too large, what do you do? How do you access items
    in your archives if you need them later?

3. Is there anything else "cool" that can be done with IMAP,
    other than web browsing?


Thanks for the advice!

Dave